First off, it's worth remembering that
you're always your own worst critic. You're always way more harsher on yourself than other people typically are; it's the same whether we're talking about looks, personal achievements or whatever. On the other hand, things could almost certainly be a lot worse for you looks-wise:- What about burns victims? What about some poor so-and-so who's had acid thrown at them? What about someone with Porteous Syndrome? The message I'm trying to send here is rather than pinning on what you don't have, be grateful for the things you
DO have; i.e. start seeing your glass as 1/2 full rather than 1/2 empty 🤔
I'm not going to patronise you by saying something along the lines of "
You're beautiful just the way you are" because I've no idea what you look like. The one thing I
WILL say is that if you're not happy about your appearance, then there are things you can do to improve it; whether that's exercise / dieting, or trying a new look / image. As long as you're able-bodied and have a desire to improve yourself, then you have the power to do this (although some people may have to work harder than others... it's still achievable if you want it bad enough). It's a bit of a cliché, but it's worth watching the musical Grease; namely Sandy's transformation at the very end.
The other thing is what are you proactively doing to put yourself in a position where people can see you? From what I've read, it sounds like your life is centred around school / college... maybe going out once in a while. Either way, it sounds like you're stuck in the same environment and never venture outwards. If you're not already at University, have you thought about applying in a new area? Have you considered travelling somewhere? A fresh new environment may be the perfect place to re-invent yourself, and you'll be meeting new people... plus you'll probably learn a lot about "
you" and develop as a person.
The last thing I'll say here is if and when you decide to take action (whether that's trying a new image, moving to a new environment or whatever), is do
NOT try to compete with or compare yourself to others. You don't know what pressures or journeys they've had to deal with. Instead, concentrate on running your own race and focus on becoming the best possible version of
YOU!. Personally, I would recommend the exercise route... because as well as the physical changes, you'll get an endorphin / dopamine hit, so you'll also feel happier and better about yourself as a bonus (I'm sure anyone who exercises regularly will back me up on this).
You're still very young, so the future is in your hands (literally); it's up to you what you make of it.

Your second sentence isn't really true.
Almost everyone who is very attractive has to put some significant effort into their appearance... Fair enough, genetics may play some role in their looks, but as a guy, you don't get a 6-pack by drinking a 6 pack of beer... they have to spend a lot of time training, plus the food sacrifices in order to get lean so a 6 pack is visible. As for girls, to reference Grease (again), as Frenchie said, "
Beauty is pain"... think of the pain they endure from all the waxing etc. to get that perfect look (not to mention any additional exercise to keep the evil cellulite at bay lol).
A personal trainer I know swears by this statement "
There's no such thing as ugly people, only lazy people".
(think about it)